Enter this command into your Terminal: sudo mount -uw / Apple is trying to protect you more by making some crucial parts of the file system read-only and we have to make it writable again.

Since macOS 10.15 Catalina, you have to do one extra step.

Restart your Mac and go to your normal macOS. On Mac with T2 security chip, you will have to disable security in Startup Security Utility while in Recovery mode. Disable System Integrity Protection with command: csrutil disable In Recovery mode, open Terminal application from Utilities in the top menu. For Apple Silicon hardware, you can can boot to Recovery mode by long pressing power button until you see “Options” button, which will lead you to Recovery mode. While starting on Intel hardware, press Command + R key combination. Since OS X 10.11 El Capitan you need to disable System Integrity Protection for a while. brew tap gromgit/homebrew-fuse brew install ntfs-3g-mac You can find detailed install manual also on macFUSE GitHub wiki. After that, install package ntfs-3g-mac from Terminal. Then you will need to download and install the latest version of macFUSE (osxFUSE) either using installer from GitHub releases page. Make sure you have Command Line Tools for Xcode and Homebrew package manager installed. But open source solution requires some messing in terminal. There is also freeware iBoyosft NTFS for Mac. You can use paid software like Paragon NTFS for Mac or Microsoft NTFS for Mac by Tuxera. And why would they support the protocol of their main competitor? How can macOS write NTFS? Microsoft is not providing a full specification of NTFS as open source standards and it is quite possible that Apple would need to pay pricey licenses in order to fully use it in their systems. It was first used in Windows NT 3.1 and is present since. NTFS is a proprietary file system standard from Microsoft used in Windows since the early 90s. NTFS drive in Disk Utility Why can’t macOS just write NTFS?

Write to ntfs on mac high sierra